Work positioning apparatus



Au 21, 19 5.- L, MEIS TER 2,383,008

WORK;POSITIONING APPARATUS Filed June 1, 1942 2 i 1' I I r I jrvumnm ILED l feistar Gum/M44 0 Patented Aug. 21, 1945 UNITED STATES FATENT,OFFICE WORK POSITIONING APPARATUS Leo Meister, Irvington, N. J.Application June 1, 1942, Serial No. 445,383

(Granted under the act of March 3, 1883, as amended April 30, 1928; 3700. G. 757) 8 Claims.

The invention described herein may be manufactured and used by or forthe Government for governmental purposes, without the payment to me ofany royalty thereon.

This invention relates to a device for work positioning apparatus whichis automatic in action. In processing articles a work holding expedientfrequency employed is to position the article in a V-shaped slot in ablock on the work table. The slot itself will determine the position ofthe work accurately, but the extraneous means used to position the workin tangency with the slot walls will not always function satisfactorilywith the result that the work is not positioned accurately and damageresults.

It is therefore an object of the invention to provide work holding meanswhich shall be automatic and certain in action.

It is a further object of the invention to provide work holding meanswhich will function independently of the processing machinery.

According to the invention the accurate positioning is perfected byproviding a magnetic field in the V-block which will ensure accuratecontact of the work with the faces of the block.

The specific nature of the invention as well as other objects andadvantages thereof will clearly appear from a description of a preferredembodiment as shown in the accompanying drawing in which:

Fig. 1 is a top plan view of a work holding block, and

Fig. 2 is a sectional view taken on the line 2-2 of Fig. 1.

Referring to the drawing by characters of reference, there is shown amounting platen l and a block 2 of non-magnetic material with a V- slot3 which is attached to the platen I for adjustability as by screws 4passing through elongated perforations 5 reinforced by sleeves 5.

On the under side of block 2 is fastened as by screws 6 a magnet, l withpoles 8 adjacent to the edges of the V-slot 3 and oriented therewith soas to direct the lines of force perpendicular thereto. The magnetisspaced from the platen I so as to maintain the intensity of its forceat the poles.

A work holder 9 is shown which by way of example is designed torepresent a holder for an ammunition or pyrotechnic shell l0 loaded withmaterial II and ready for compressing operation of a plunger 12. Thework piece when tangent to the sides of the V-slot will be in exactposition to receive the plunger l2. However, as shown in Figure 1 inphantom, the work piece may not be accurately positioned by the'ordinarypositioning units (not shown) or may have been jarred away from truework holding position by vibrations or shocks. With the presentinvention if the work piece is placed anywhere near the true workholding position it will be within the field of the magnet and will bedrawn into tangency, and once placed it will not'be dislocated by minordisturbing forces. The work holder 9, or some portion thereof should beof magnetic material. While a permanent magnet is shown, it will beunderstood that the magnet may be energized by an electric current ifthe load requires such. Obviously the magnet may be located in otherpositions than the one shown. For instance, it may be positioned atopthe insulating block 2.

I claim:

\ 1. Work positioning apparatus comprising a block of non-magneticmaterial having sides angularly placed with respect to each other toreceive a work piece and magnetic means of opposite polaritycloselyadjacent each of said sides for automatically positioningsaidworkpiece.

2. Work positioning means comprising positioning means of non-magneticmaterial for a work piece, and magnetic means of opposite polarityadjacent said positioning means for automatically positioning saidworkpiece.

3. Work positioning means comprising a block of non-magnetic materialhaving sides angularly placed with respect to each other to receive awork piece, and magnetic means of. opposite polarity closely adjacenteach of said sides for automatically positioning said workpiece.

4. Work positioning means comprising a block of non-magnetic materialhaving sides angularly placed with respect to each other to receive awork piece, and magnetic means of opposite polarity adjacent said sidesrespectively whereby a magnetic flux is established between said sidesfor automatically positioning said workpiece.

5. A work positioning apparatus for positioning a cylindrical workpieceof magnetic material, comprising a platen for supporting the work, anon-magnetic block attached to said platen, said block being providedwith a V- shaped slot, a magnet attached to the block I with oppositepoles adjacent the sides, respectively, of said slot whereby a magneticflux is established across the slot to draw the cylinder therein withits periphery in tangential contact with the sides of the slot.

6. A work positioning apparatus comprising a block of non-magneticmaterial provided with a slot of a shape of predetermined accuracy withrespect to a workpiece of magnetic material to be positioned by contactwith said slot, and magnetic means for effecting such contact wherebythe workpiece is automatically accurately positioned '7. Aworkpositioning apparatus, comprising a block of non-magnetic materialhaving a V- shaped slot therein for the reception of a cylindricalworkpiece of magnetic material, magnetic means of opposite polarityarranged to draw the cylinder into said slot with its periphery intangential contact with the sides of the slot whereby said cylinder isautomatically accurately positioned.

8. The invention of claim 5 characterized in that there is means carriedby the platen and means carried by the non-magnetic block whereby theblock may be adjusted relative to theplaten to accommodate work piecesof different diameters LEO MEIS'I'ER.

